Recent content by blackblanx

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    Proving Hyperbola for Quadratic Equation (X^T)AX = k

    Homework Statement Let A be a 2x2 symmetric matrix and x be a scalar. Prove that the graph of the quadratic equation (X^T)AX = k is hyperbola if k is non zero and det(A) less than zero (T stands for transpose Homework Equations not were to begin
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    How to Calculate the Heat Released in Magnesium Combustion Reactions?

    Homework Statement Heat of Reaction for the combustion of Magnesium Data: A. Mass MgO = 0.7975g Volume 1M HCl = 97.5 ml Temp.intial = 24.2 C Temp.final = 29.3 C \DeltaT = 5.1 C B. mass Mg 0.0896g Volume 1M HCl 89.5 ml Temp...
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    How to Calculate Capacitance for Two Slanted Conducting Plates?

    What are you using for d' ?
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    How to Calculate Capacitance for Two Slanted Conducting Plates?

    Homework Statement Determine the capacitance of two conducting plates facing each other at an angle as shown (in link) . Plate A and B have dimensions of 10x20 cm and 10x (20sec30) (angles in degrees) Homework Equations C=( \epsilon A)/d The Attempt at a Solution not quite sure can...
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    Explaining Linear Dependence in 5 x 3 Matrix A

    Homework Statement For Any 5 x 3 matrix A, explain why rows of A must be linearly dependent. The Attempt at a Solution No idea please drop a hint
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    Were is the electric field zero?

    ok thanks
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    Were is the electric field zero?

    Forget I realized that does not work any ideas of how to find the coordinates?
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    Were is the electric field zero?

    oh wait never mind i think i got it know thanks it would just be the negative of the electric field vector divided by k(5\muC)
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    Were is the electric field zero?

    but what are the coordinates of where that charge should be placed?
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    Were is the electric field zero?

    Homework Statement What is the net electric field intensity at the origin due to two charges Q1= 2\muC at (x=3,y=4) and Q2 = -10\muC at (x=6,y=-8). And where should a third charge of magnitude 5 \muC be placed so the net electric field at the origin is zero? Homework Equations E=KQ/R^{2}...
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    Undergrad Solving a Linear Differential Equation: y'''+3yy''+2y'=3x+1

    oh ok thank you
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    Undergrad Solving a Linear Differential Equation: y'''+3yy''+2y'=3x+1

    Is the following a linear differential equation? I think it is since the y near the y''. y'''+3yy''+2y'=3x+1
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    How do you know what delta to choose

    but can you explain your steps a little more please, I've never seen it done like that before. up at the top how did X-1<delta turn into l1l-lxl<=l1-xl<=delta
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    How do you know what delta to choose

    Oh, I see thank you snipez.
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    How do you know what delta to choose

    I got the problem from http://archives.math.utk.edu/visual.calculus/1/definition.8/index.html and they say that delta is .06542 but they are unclear of how they decided that. How did they come to that conclusion?